SIMPLE MOD MAY SOLVE POD TUNING HARDSHIPS!

The Alternative Screws that article refers too are Sync Screws.

We eliminate the need to adjust Sync Screws for Idle by BENCH SYNCING the Throttles with the THINNEST Medium available.
3X5 Card
Business Card
Resume' Paper
35mm Film Strips ...

THIS Syncs the Throttles VIRTUALLY Closed.
The setting of IDLE is then made much simpler because the Pilot System supplied the Mixtures to make the Bike run.

No adjustment of the Sync Screws is needed until you actually begin the process of Syncing the Carbs for an accurate Vacuum Sync.

 

I am still a bit puzzled by the whole atmospheric air thing to the kidney ports.

One thing I noticed when cleaning my carbs was that when I passed the air blower nozzle over the ports, the diaphrams slammed open to the top. So, I can assume that with pods, that this increased volume of air the diaphrams will open much quicker/sooner than with the restriction of the factory air box. That being said, this mod that Rick suggested, and Wrench26 is real world testing, should work wonderfully provided the "kidney port pod tubes" allow darn near the same volume of air as the factory setup. In effect this mod should do exactly as it is intended, to allow using pods without having to rejet. However, aside from aesthetics, most use pods looking for a performance increase, and this mod really won't provide that aspect.

The other thing I don't like about pods is that they do not allow wet weather protection to the intake tract. But...K&N does have off-road filter elements for autos and all that is different is a foam sleeve that slips over the filter element. No, if you can find them, that should help.

Oh, and another thing. Wrench26, for an easy way to shape the kidney ports, take a sacrificial carb to a machine shop and have then slice precisely through the horizontal center of the port. Then tap bolt holes on either side of the pieces. With that, you have made a very simply stamping die you can use to form the tube ends precisely. Plus you can then take the two pieces and have a tool and die shop fab die molds from tooling steel that will last a lifetime. Then all you would need is a small press. A table top walnut cracker comes to mind. Cut the correct size aluminium tubing to length, place the die molds in the press, lube the end of the tube to be formed, pull down on the walnut cracker handle, and voila, a precisely shape kidney tube.

 

hey moo1alk i have completed the center die and almost finished the press side of the die using a large get of slip joint pliers. just finishing the filing down to make it have the correct space to account for the 26 Ga metal. works really good with just the center as of now. i ran out of argon for welding so i and on hold. prob just solder for this temp test. hopefully this week i can get the few hours i need. Army pulling me in 5 directions and always need family time. so hopefully i can get out into the garage today after my to jobs and finish test.

 

i REPEAT I REPEAT...... BOGGY ON HOLE SHOT... NO MORE BACKFIRE DECELERATION.... SMELL RICH FUEL MIXTURE..... ENGINE COOLER THAN HAS BEEN.... CAN'T USE NORMAL CHOCK BOGGS DOWN ENGINE.... VERY STRONG PULL MORE THAN WHAT HAS BEEN THERE..... VERY SMOOTHT ECLERATION... ENGINE REVS SMOOTH AND VERY FAST. I BELIEVE WE HAVE DONE IT.... WILL BE PULLING PLUGS AFTER MORNING FORMATION AND CHECKING COLOR AND THEN GET PICTURES.....

 

the first is cylinder 1 and 2 rich.... the second is 3 and 4. have to change onc thing cylinder 4 has the foam breather have to find a thinner diapham.

 

You still have a Lean Condition on the 4-Hole.
Too much air?
-Or-
Not enough Fuel?

If the Lean Condition was alleviated on 1, 2, & 3, ... I'd look for a AIR Leak.
But, ...
You have to check-out everything.
Right Main Jet / Not fowled.
Manifold Leaks / Cracks
Tightness --> DANGER!
E-Tube Clean and Clear
Diaphragm Integrity
Piston Travel
Vacuum Nipple Seal
Float

 

My neighbors have avocado trees so when we want avocados we just pluck one wife is into all the cooking stuff I will ask her to check it out. Thanks

 

TIME The kidney shaped hole never ever saw atmospheric air pressure (14.7 psi at sea level) in the original configuration so how would introducing atmospheric air pressure fix this problem? Remember ricks observations are based on using a shop vac I guess he used some SMOKE to observe the bernelli effect. These carbs draw fuel with differential air pressure (-) the problem is the loss of vacuum not atmospheric air pressure. Ask yourself this why is it that pods dont seem to effect the idle circuit?

 

as far as those plug pics well when you have one plug that far out the whole test is null. If your test setup is not totally equal then that is not a legit test. Try again

 

will do... clean up plugs and reset. i will pull my top again and double check clearance and also verify snyc. along with fixing a leak i have on the valve cover.

 

I can't believe how hostile of a tone people seem to have regarding this subject. Perhaps it is just the internet's way of come across or just the way I'm perceiving it.

Why not just be encouraging for someone to spend time experimenting and learning? It sure seems like the risks are well known so the collaborative encouragement would do little to no harm.

I will most likely never run Pods but if others want to and they can find a way to do it than more power to them. Keep at it!

 

Unless you recently replaced the rubber "donut" washers on the cylinder, you should consider doing so. That could even be the source of your valve cover leak perhaps. You can get a full set from Chacal for under $20 (plus shipping)

 

from the test this after noon. 2 and three has a very nice ring of light tan while 1 and 4 where white... here is the picture

 

What factor of performance in 3 out of 4 Carbs renders this Experiments results NULL.

The Carbs are Individual Units; not one whole entity.

The Experiment showed a Vast improvement in 75-Percent of the Carbs tested.
3 out of 4 showed improvement.

Point seven five zero.
With, ...
Point three two five ... considered an outstanding percentage for striking a baseball thrown from around 60 feet.

I have to say he's doing OK.
Moving in the right direction.
Improvement shown.
Differentials noted.
Satisfactory results upon initial testing.

Prototype Approved.

::: It worked better than 50-50 :::

This isn't the Thread where you come-in and complain about it.
This is the Thread where you come-in with constructive criticism or YOUR idea about what can be done to improve the results.

We're engaged in this experiment because we have nothing better to do.

 

I notice that you have dynojet stage 3 in your sig.

Is that on these carbs?

If so, you may want to change back to the original jets later and do some further testing, so that others will know how this mod will work on standard carbs as well as rejetted ones.

 

I can do that. The one thing that I'm kinda wondering. Once I put the breathers out side the cone my choke is almost doesn't do anything. It picks up a little but not like it use to. It use to run 2-2400 easy now barely makes 1500-1750 when warmed up. I'm going to be doing a valve check this weekend if I'm in town. I believe that is my prob with #4 cylinder. Buts what your guys input on the choke change and change is an understatement. Plugs and engine is very rich and boggy just idling and revving engine. It sounds like pup pup pup to about 2000 then starts to eccelerates fine.

 

Hey - can you grab a camera and post a video (on Youtube)

 

what you want a video of....

 

If it is rich and boggy idleing to 2k, then you are still too rich. +1 on what darkfibre said, do you still have the jet kit in? If so change back to stock jetting, reset mixture screws to 2.5 turns out and then check plugs or colortune for idle. Do plug chops for off idle to verify main fuel mixtures.

 

its only boggy when i have the choke on other than that there no no performance problem once warmed up and no choke....